That is because Ariana Grande has been receiving scores of messages of support from her some 16.3 million followers as she tweets heartbreaking posts about taking care of her ailing grandfather, who has been battling cancer. She had flown from New York to her native Florida before Independence Day to be with him and her grandmother.

On Thursday, July 3, the pop star posted several photos of her grandfather, lying on a bed, on her Twitter and Instagram pages.

The 21-year-old singer of top radio hit "Problem" and new single "Break Free" and star of the series Sam & Cat has tweeted about her grandfather's illness before, including on World Cancer Day on Feb. 4 and on June 6, when she said his "cancer was at bay and the malignant cancer is GONE." She added, "My 90 y/o grandpa is a f--king hero," and "an inspiration and a fighter."

Her fans have dubbed him "Grandpa Grande" and have spurred trending hashtags supporting him in the past.

Grande said on Twitter, in response to a fan's question on July 3, that her grandfather's cancer is still "at bay but the treatment (chemo + radiation) really took a toll on him ... he's havin a lil trouble."